Squeaks and Rattles Repair Manual
July 2010 Page 17 of 21
Sat-Nav Rattle (Loose in the aperture)
SRO: 19.07.CJ
Safe VINs: DBS - E01610, DB9 - A12546, V8 Vantage - C13503, V12 Vantage - S00185
Repair
CAUTION:
BE CAREFUL WHEN YOU RELEASE THE INSTRUMENT PANEL VENEER BEZEL. THE SURFACE FINISH CAN BE EASILY DAMAGED.
1. Release the four clips that attach the centre-s tack instrument panel (refer to Figure 1).
Figure 1
2. Disconnect the electrical connectors from each of the fo ur transmission control switches (refer to Figure 2).
Figure 2
3. Disconnect the electrical connector from the igni tion start/stop switch (refer to Figure 3).
Squeaks and Rattles Repair Manual
July 2010 Page 19 of 21
Figure 6
8. Install the hinge bracket gear onto the new left hinge bracket.
9. Install the new left and right side brackets onto the pane l and torque the screws to 3 Nm (refer to Figure 7).
Figure 7
10. Put the centre-stack instrument panel into position (refer to Figure 8).
Figure 8
11. Connect the electrical connector to ignition start/stop switch (refer to Figure 9).
AML EOBD System Operation Summary
Rory O’Curry Aston Martin Lagonda CONFIDENTIAL 1 May 2009
[email protected] AML EOBD Monitors 07 ROC.doc Page 10 of 43
HO2S Monitor
Front HO2S Signal
The time between HO2S switches is monitored after vehicle startup and during closed loop fuel
conditions. Excessive time between switches or no switc hes since startup indicate a malfunction. Since
'lack of switching' malfunctions can be caused by HO2S sensor malfunctions or by shifts in the fuel
system, DTCs are stored that provide additional information for the 'lack of switching' malfunction.
Different DTCs indicate whether the sensor was st uck lean/disconnected (P1131, P1151), stuck rich
(P1132, P1152) or stopped switching due to excessive long term fuel trim corrections (P1130, P1150).
HO2S 'Lack of Switching' Operation:
DTCs Bank 1 – P0132, P2195, P2196
Bank 2 – P0152, P2197, P2198
Monitor execution continuous, from startup and while in closed loop fuel
Monitor Sequence none
Sensors OK TP, MAF, MAP, ECT, CHT, ACT, IAT
Monitoring Duration 30 to 60 seconds to register a malfunction
Typical HO2S 'Lack of Switching' entry conditions : Minimum Maximum
Throttle Position part throttle
Idle State (not at idle, part throttle)
Engine Load 20% 60%
Time since engine start-up 180 seconds
Inferred Exhaust Temperature 800 oF
Typical HO2S 'Lack of Switching' malfunction thresholds:
< 5 switches since startup after 30 seconds in test conditions
> 60 seconds since last switch while closed loop
> 30 seconds since last switch while closed loop at Short Term Fuel Trim limit
HO2S lack of switching temporary disablement conditions (other than entry requirements) :
Air Charge Temperature, ACT (or IAT) < -20 °F (minimum Cold Climate Test Temperature).
Failure of the sensors mentioned in the above “Sensors OK” section.
The HO2S is also tested functionally. The response rate is evaluated by enteri ng a fixed frequency square
wave, fuel control routine. This routine drives the air/fuel ratio around stoichiometry at a calibratable
frequency and magnitude, producing pr edictable oxygen sensor signal amplitude. A slow sensor will show
a reduced amplitude. Oxygen sensor signal amplitude below a minimum threshold indicates a slow sensor
malfunction (P0133 Bank 1, P0153 Bank 2).
HO2S Response Rate Operation:
DTCs Bank 1 - P0133, Bank 2 - P0153
Monitor execution once per driving cycle
Monitor Sequence none
Sensors OK ECT, IAT, MAF, MAP, VSS, CKP, TP, CMP, no misfire DTCs
Monitoring Duration 4 seconds
